using System;
using System.IO;

using iTextSharp.text;

/*
 * $Id: PdfDashPattern.cs,v 1.3 2008/05/13 11:25:19 psoares33 Exp $
 * 
 *
 * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

namespace iTextSharp.text.pdf {

    /**
     * A <CODE>PdfDashPattern</CODE> defines a dash pattern as described in
     * the PDF Reference Manual version 1.3 p 325 (section 8.4.3).
     *
     * @see        PdfArray
     */

    public class PdfDashPattern : PdfArray {
    
        // membervariables
    
        /** This is the length of a dash. */
        private float dash = -1;
    
        /** This is the length of a gap. */
        private float gap = -1;
    
        /** This is the phase. */
        private float phase = -1;
    
        // constructors
    
        /**
         * Constructs a new <CODE>PdfDashPattern</CODE>.
         */
    
        public PdfDashPattern() : base() {}
    
        /**
         * Constructs a new <CODE>PdfDashPattern</CODE>.
         */
    
        public PdfDashPattern(float dash) : base(new PdfNumber(dash)) {
            this.dash = dash;
        }
    
        /**
         * Constructs a new <CODE>PdfDashPattern</CODE>.
         */
    
        public PdfDashPattern(float dash, float gap) : base(new PdfNumber(dash)) {
            Add(new PdfNumber(gap));
            this.dash = dash;
            this.gap = gap;
        }
    
        /**
         * Constructs a new <CODE>PdfDashPattern</CODE>.
         */
    
        public PdfDashPattern(float dash, float gap, float phase) : base(new PdfNumber(dash)) {
            Add(new PdfNumber(gap));
            this.dash = dash;
            this.gap = gap;
            this.phase = phase;
        }
    
        public void Add(float n) {
            Add(new PdfNumber(n));
        }
    
        /**
         * Returns the PDF representation of this <CODE>PdfArray</CODE>.
         *
         * @return        an array of <CODE>byte</CODE>s
         */
    
        public override void ToPdf(PdfWriter writer, Stream os) {
            os.WriteByte((byte)'[');

            if (dash >= 0) {
                new PdfNumber(dash).ToPdf(writer, os);
                if (gap >= 0) {
                    os.WriteByte((byte)' ');
                    new PdfNumber(gap).ToPdf(writer, os);
                }
            }
            os.WriteByte((byte)']');
            if (phase >=0) {
                os.WriteByte((byte)' ');
                new PdfNumber(phase).ToPdf(writer, os);
            }
        }
    }
}